FOX ESS EQ4000 LFP Battery, FXESS 30-221-00001-00

The FOX ESS EQ4000 LFP Battery (part number FXESS 30-221-00001-00 is a high-voltage, modular, lithium iron phosphate (LiFePO₄) battery module designed specifically for integration with FOX ESS All-in-One (AIO) systems, such as the PowerQ series hybrid energy storage solutions.

This battery delivers reliable, scalable energy storage for residential and light commercial solar + storage applications, emphasizing efficiency, safety, and ease of installation.

Key Features

• Battery Chemistry: Advanced LiFePO₄ (LFP) prismatic cells for superior thermal stability, long cycle life (typically ≥6000 cycles), and enhanced safety compared to other lithium chemistries.
• Nominal Capacity: 3.97 kWh per module (usable energy based on 90% Depth of Discharge).
• High Efficiency: >95% round-trip efficiency, maximizing energy retention and system performance.
• Depth of Discharge (DoD): 90%, allowing greater usable capacity without compromising battery longevity.
• Modular and Scalable Design: Stackable in series—up to 7 modules per stack for a maximum of approximately 27.80 kWh per stack (depending on configuration). Multiple stacks can be paralleled in compatible AIO systems for even larger capacities (e.g., up to ~80 kWh in PowerQ setups with multiple units).
• High-Voltage Operation: Nominal voltage around 115.2V per module (for a 2-module stack), with operating ranges scaling up to ~459.9V in full 7-module configurations, enabling efficient high-voltage system integration.
• Charge/Discharge Performance: Maximum continuous charge/discharge current of 50A, with peak discharge up to 65A (for 60 seconds), supporting robust power delivery for backup and load demands.
• Communication: CAN protocol for seamless integration and monitoring with FOX ESS inverters and systems.
• Installation and Durability: Plug-and-play design for quick setup, wide operating temperature tolerance, and suitable for floor-mounted indoor/outdoor use (often with IP-rated protection in AIO enclosures).
• Compatibility: Optimized exclusively for FOX ESS AIO applications, such as PowerQ hybrid systems, providing features like fast charging, generator compatibility (via accessories), and remote monitoring through the FOX ESS app or portal.

Ideal For

Homeowners or installers seeking flexible, high-performance energy storage to pair with solar PV for self-consumption, time-of-use optimization, whole-home backup, or off-grid resilience. Its modularity allows systems to grow with energy needs, while LFP chemistry ensures long-term reliability and safety.

For the most up-to-date details, specifications, or installation guidelines, refer to the official FOX ESS US datasheet (e.g., US-AIO-EQ4000-Datasheet) or contact a certified FOX ESS distributor.